Chemical Vapor Deposition of Helical Carbon Nanofibers

Suda, Yoshiyuki

doi:10.5772/intechopen.81676

Cited by 1 publication

(1 citation statement)

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“…Platelets can contribute to the formation of lightweight and porous, but strong, nano-gels [40][41][42]. HCNTs have strong chiral, magnetic, piezo-electric properties, and may act as nano-springs [43][44][45][46][47][48][49][50][51][52]. Even within the same group, such as CNTs, different lengths, thicknesses, layers of graphene walls, etc.…”

Section: Introductionmentioning

confidence: 99%

Controlled Growth of Unusual Nanocarbon Allotropes by Molten Electrolysis of CO2

et al. 2022

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This study describes a world of new carbon “fullerene” allotropes that may be synthesized by molten carbonate electrolysis using greenhouse CO2 as the reactant. Beyond the world of conventional diamond, graphite and buckyballs, a vast array of unique nanocarbon structures exist. Until recently, CO2 was thought to be unreactive. Here, we show that CO2 can be transformed into distinct nano-bamboo, nano-pearl, nano-dragon, solid and hollow nano-onion, nano-tree, nano-rod, nano-belt and nano-flower morphologies of carbon. The capability to produce these allotropes at high purity by a straightforward electrolysis, analogous to aluminum production splitting of aluminum oxide, but instead nanocarbon production by splitting CO2, opens an array of inexpensive unique materials with exciting new high strength, electrical and thermal conductivity, flexibility, charge storage, lubricant and robustness properties. Commercial production technology of nanocarbons had been chemical vapor deposition, which is ten-fold more expensive, generally requires metallo-organics reactants and has a highly carbon-positive rather than carbon-negative footprint. Different nanocarbon structures were prepared electrochemically by variation of anode and cathode composition and architecture, electrolyte composition, pre-electrolysis processing and current ramping and current density. Individual allotrope structures and initial growth mechanisms are explored by SEM, TEM, HAADF EDX, XRD and Raman spectroscopy.

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